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Factoring the term on the left:

You can cancel like-numbers if found on both numerator and denominator:

Factoring the term on the right:

You can cancel like-numbers if found on both numerator and denominator:

Combining:

You can cancel like-numbers if found on both numerator and denominator:

Factoring numerator:

You can cancel like-numbers if found on both numerator and denominator: